std::swap(std::any)

Since C++17

Header: <any>

Overloads the std::swap algorithm for std::any. Swaps the content of two any objects by calling lhs.swap(rhs).

# Declarations

void swap( any& lhs, any& rhs ) noexcept;

(since C++17)

# Parameters

lhs, rhs: objects to swap

# Example

#include <any>
#include <print>
#include <string>
 
int main()
{
    std::any p = 42, q = std::string{"Bishop"};
    std::println("p: {}, q: {}", std::any_cast<int>(p), std::any_cast<std::string&>(q));
    std::println("swap(p, q)");
    std::swap(p, q);
    std::println("p: {}, q: {}", std::any_cast<std::string&>(p), std::any_cast<int>(q));
}

# See also

swap